Which of the following is/are the criteria for a political party to be recognized as a National party?

a. It secures 6%  of the valid votes polled in any 4 or more states and four seats in a Lok Sabha general election.

b. It wins 2% of the seats from at least 3 states in Lok Sabha general election.

c. It is recognized as a state party in at least 4 states.

Select correct from the code given below.